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你好,我有问题表里维斯和我试图检查哪些reeve创造最大的问题。所以这里是我的问题模型;如何分组虚拟列
public int Id { get; set; }
public string Name { get; set; }
public string Text { get; set; }
public short Sira { get; set; }
public DateTime Created { get; set; }
public virtual Topic Topic { get; set; }
public virtual Member WhoIs { get; set; }
public virtual Province Province { get; set; }
public virtual Town Town { get; set; }
public virtual District District { get; set; }
public virtual Reeve Reeve { get; set; }
正如你看到的我有里夫,我创建表的虚拟table.When我得到Reeve_Id
,并试图.GroupBy(m => m.Reeve.Id)
因此,这里的代码;
public ActionResult GroupByReeve()
{
var model = new ProblemModel
{
ProblemsList = Db.Problems.GroupBy(m => m.Reeve.Id)
.Select(s => new ProblemModel.ProblemForView
{
Id = s.FirstOrDefault().Id,
CountItem = s.Count(),
AllItem = Db.Problems.Count(),
ReeveName=s.FirstOrDefault().Reeve.Name
})
};
return View(model);
}
所以我不能ReeveId.The视图返回GROUPBY通过它们的ID问题4项(4个问题),但它们只属于2里夫斯所以它必须显示2项没有4项。我该怎么做 ?